Awesome tyre, though a little pricey! I am running a turbo on my TVR T350c, so with power (depending on boost) around 500 BHP these tyres could take a lot more power! First gear marginal slip followed by immediate bite and grip.
Unbelievable in the wet too. I would not advise too much track stuff with these - although they are pretty good (although suffered fair amount of brake lock under heavy braking) - they are simply too expensive to use regularly on a track given the wear they suffered. So, fine for a maybe 2 or 3 track days a year, otherwise I would suggest a proper semi for the track - I use Bridgestone RE55's which are much cheaper, have far superior track grip, although have 0% grip in the wet, and only last about 6 track days...but at half the price of the Sports it does make sense. My sports are still looking good with about 50% tread left after 10,000 miles on the TVR.